Orbital Motion Sirius A and Sirius B Sirius

Orbital Motion Sirius A and Sirius B Sirius A Sirius B Center of mass

Orbital Motion Sirius A and Sirius B Orbital plane (looking at an angle) Orbital plane (looking perpendicular to the orbital plane along the red arrow) Sirius A Sirius B Center of mass

Orbital Motion Sirius A and Sirius B Plane of the Sky 0 31 62 93 124 arc-seconds Sirius A Sirius B Center of mass

1850 Sirius A on the sky arc-seconds +6 0 -6 0 31 62 93 124 arc-seconds Sirius A and B in space

1855 arc-seconds +6 0 -6 0 31 62 arc-seconds 93 124

1860 arc-seconds +6 0 -6 0 31 62 arc-seconds 93 124

1865 arc-seconds +6 0 -6 0 31 62 arc-seconds 93 124

1870 arc-seconds +6 0 -6 0 31 62 arc-seconds 93 124

1875 arc-seconds +6 0 -6 0 31 62 arc-seconds 93 124

1880 arc-seconds +6 0 -6 0 31 62 arc-seconds The "center of mass" will remain fixed in the following slides. Watch the orbits carefully. 93 124

1885 arc-seconds +6 0 -6 0 31 62 arc-seconds 93 124

1890 arc-seconds +6 0 -6 0 31 62 arc-seconds 93 124

1895 arc-seconds +6 0 -6 0 31 62 arc-seconds 93 124

1900 arc-seconds +6 0 -6 0 31 62 arc-seconds 93 124

1905 arc-seconds +6 0 -6 0 31 62 arc-seconds 93 124

1910 arc-seconds +6 0 -6 0 31 62 arc-seconds 93 124

1915 arc-seconds +6 0 -6 0 31 62 arc-seconds 93 124

1920 arc-seconds +6 0 -6 0 31 62 arc-seconds 93 124

1925 arc-seconds +6 0 -6 0 31 62 arc-seconds 93 124

1930 arc-seconds +6 0 -6 0 31 62 arc-seconds 93 124

1935 arc-seconds +6 0 -6 0 31 62 arc-seconds 93 124

1940 arc-seconds +6 0 -6 0 31 62 arc-seconds 93 124

1945 arc-seconds +6 0 -6 0 31 62 arc-seconds 93 124

1950 arc-seconds +6 0 -6 0 31 62 arc-seconds 93 124

1955 arc-seconds +6 0 -6 0 31 62 arc-seconds 93 124

North W E 4 arc-minutes or 1/15 degree Search for Companions Around Sirius J. M. Bonnet-Bidaud , F. Colas and J. Lecacheux Astronomy and Astrophysics v 360, 991 -996 (2000)